No interactive markers visible/available in RViZ

[YantianZha]

Hello,

I am using the Kinetic version of fetch_ros software. I am trying to interactively control the fetch arm by following this tutorial. However, I cannot get the interactive markers as shown in that tutorial. Besides following the tutorial, I have tried multiple ways like changing the Interactive Marker Size in fetch_moveit_config/launch/moveit.rviz to a value above 0, and adding an InteractiveMarkers entry in the Display panel of RViZ. I also checked the fetch SRDF file but did not find anything wrong.

The commands I have used is one or a combination of the following:

roslaunch fetch_moveit_config demo.launch
roslaunch fetch_moveit_config move_group.launch
roslaunch fetch_gazebo playground.launch

I would appreciate a lot if someone could provide a direction to debug it.